【单选题】Listen to Passage 2 in "Listening in" and choose the correct answer to the question. What do you think "the dress down Friday" means?
A.
Wear a dress on Friday
B.
Wear casually or informally on Friday
C.
Go to buy a dress on Friday
【简答题】Read the passage about "Balance Sheet" and answer the following questions. Questions: 1. What is a balance sheet? Why is it so called? 2. What are the two types of balance sheets?
【判断题】在运输过程中旅客自带物品毁坏、灭失,承运人应当承担损害赔偿责任。()
【单选题】用 pH 试纸测定某无色溶液的 pH 时,规范的操作是( )。
A.
将 pH 试纸放入待测溶液中润湿后取出,半分钟内跟标准比色卡比较
B.
将待测溶液倒在 pH 试纸上,跟标准比色卡比较
C.
用干燥洁净玻的璃棒蘸取待测溶液,滴在 pH 试纸上,立即跟标准比色卡比较
D.
将 pH 试纸剪成小块,放在干燥清洁的表面皿上,再用璃棒蘸取待测溶液,滴在 pH 试纸上,半分钟内跟标准比色卡比较
【判断题】用pH试纸测试水质时,pH值在1~6时属碱性。